hpcc-systems/HPCC-Platform — pull request #6786 by ghalliday (2014-12-19 15:28:23+00:00)
Title: HPCC-12665 Use a list to maintain a list of heaplets that may have space

* Add a lockless singly linked list of heaplets that may potentially
have any spare space. This avoids walking all the heaplets when checking
if any existing blocks have space, and when checking for heaplets to
return to the global memory pool.

* Convert the list of heaplets for a heap from singly to doubly linked to
optimize removal of empty heaplets.

Signed-off-by: Gavin Halliday